i actully prefer the Gamecube version not cause it has a laser pointer but its more funner and original.
btw, every zombie player should know this but when you get attacked, put ur back in a corner and shoot, and if you get surounded, first shoot someone in da head or knee and pull off a CQC.
idk if its a glitch or something but birds are not afraid of gernades, us that to your advantage.